Microflora in fish digestive tract plays significant role in digestion and metabolism

Abstract

Microflora of the environment plays an important role in the formation of the microflora of the digestive tract of fishes (Strom and Olafsen Microbiology of poecilotherms Elsevier, Amsterdam, pp 181-185 1990; Hansen et al. Appl Environ Microbiol 58:461-470 1992). Compared to water, digestive tract is an ecosystem far richer in nutrients and therefore more favorable for the growth of the majority of bacteria. Definitely, not all bacteria in food which gain entry in the digestive tract of fishes establish themselves there (Yan-Bo Wang et al. Aquaculture 281(1-4): 1-4 2008).Part of them adapts themselves in the digestive tract, whereas the others are digested by the enzymes produced by the host organism. Microorganisms present in the digestive tract feed on the food of the host organism which is digested by the enzymes produced by them and by the latter. 'Chymous' gets formed which decides the abundance and qualitative composition of microorganisms present in digestive tract.

Seleksi dan Identifikasi Bakteri Selulolitik yang Dapat Mendegradasi Serat Kasar Daun Singkong

“…Berdasarkan hal ini, maka peluang untuk mendapatkan bakteri selulolitik dari saluran pencernaan ikan gurame cukup besar. Hal ini didukung oleh beberapa penelitian yang menunjukkan bahwa bakteri selulolitik banyak terdapat dalam saluran pencernaan ikan, seperti ikan gurame (Murwantoko et al, 2009;Kurniasih et al, 2012), ikan perisai (De Castro et al, 2011) dan ikan mas, mola, nila (Ganguly & Prasad, 2012).…”

A Pharm-Ecological Perspective of Terrestrial and Aquatic Plant-Herbivore Interactions

“…Nonetheless, there are other examples in domestic ruminants (Majak, 1992) where an increase in toxicity occurs via microbial modification. Although hindgut fermenters are expected to benefit from microbial detoxification of PSMs less than foregut fermenters, microbes inhabit the mucosal lining of the intestine prior to the cecum in many terrestrial (Frey et al, 2010;Yamamoto et al, 2009) and aquatic animals (Ganguly and Prasad, 2011;Mondal et al, 2008). Additional studies are clearly needed to identify the positive and negative influences microbial communities have on herbivores with either complex or simplified digestive tracts such as those found in marine and freshwater invertebrates (Brunet et al, 1994;Freese and Schink, 2011).…”

Microfloral Diversity in Fish: An Editorial

“…Till date, no pathogenic microflora or microflora of aquatic interest regarding fish respiratory system have been reported. Microflora residing on skin has no role to play in nutrient digestion and metabolism in fish [1].…”

“…In-depth study has been done on the various aspects of the microflora of the digestive tract of fish but data about the impact of xenobiotics on the intestinal microflora of hydrobiont is limited. If bacteria non-typical of the living environment of hydrobionts are abundant in the water surrounding the latter, they make a negative influence on the immune system of fish by restraining it, thus impacting the animal's general physiological state [1].…”